I stumbled across this nifty site called the Wayback Machine which allows you to look at archived google caches from 'Wayback' when. If you look up PhysicsGRE.com you can find cached images from as far back as 2004. Below is a picture from February 2005 of the original design of the forum. I think my favorite part of the old forum is the "REA-GRE Physics Book" not only because it didn't survive but also because Grant had to utilize the description section of the forum to ask people not to tear it apart.
[Click here to open the image in full size]